Flags at the U.S. Capitol were ordered to be flown at half-staff on Friday in honor of a Capitol police officer killed in the line of duty.
"It is with profound sadness that I share the news of the passing of Officer William "Billy" Evans this afternoon from injuries he sustained following an attack at the North Barricade by a lone assailant", Acting Police Chief Yogananda Pittman of the US Capitol Police (USCP) said. The driver, identified as 25-year-old Noah Green, was shot and killed after he got out of his vehicle and lunged at police with a knife.
The suspect was taken into custody.
Authorities shot the suspect, identified by law enforcement officials as 25-year-old Noah Green, who later died at a hospital. He had been a member of the U.S. Capitol Police for 18 years.
Evans was a member of the Capitol Division's First Responder's Unit who often tried to lighten the mood at the Capitol.
House Speaker Nancy Pelosi hailed Evans as a "martyr for our democracy".
President Joe Biden issued a statement expressing condolences over the death of the police officer.
Calls are growing to ramp up security once again at the US Capitol and enhance training after a policeman was killed and another injured in a vehicle ramming attack.
While lawmakers hated the fencing in bipartisan fashion - with some calling it an overreaction - the police who took the brunt of the siege that day have still left an inner fencing perimeter intact, as they try to ensure the safety of the complex and the lawmakers who work there.
Biden, who is spending the weekend at Camp David, also ordered the United States flag to be flown at half-staff at the White House and all federal buildings Friday until sunset on April 6 in honor of Evans.
Police said later Friday that the second officer struck by the vehicle, who was not identified, was in stable condition. One USCP officer was transported by a USCP cruiser to the hospital.
He served with the department for 18 years. Officer Brian Sicknick died from injuries sustained during the January 6 insurrection; two other officers died by suicide in the weeks after that attack. The suspect died after being shot by the police.
Later the police said that lockdown was lifted and the USCP has "cleared the external security threat incident located at all of the U.S. Capitol Campus buildings, however the area around the crime scene will continue to be restricted and individuals should continue to follow police direction". "Which is what I think he always really enjoyed doing to me and some of us he sees all the time".
Investigators are increasingly focused on Green's mental health as they work to identify any motive for the attack, said the official, who was not authorized to speak publicly about an ongoing investigation and spoke to The AP on condition of anonymity.
"We've got to figure out what the sweet spot is with the security", he said.